CDCE62005 datasheet(44/85 Pages) TI1

44 / 85 page

r.0

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EXT_LFN

EXT_LFP

external

internal

external

internal

CDCE62005

SCAS862F – NOVEMBER 2008 – REVISED JANUARY 2015

www.ti.com

8.3.5.18.4

Loop Filter

Figure 29 depicts the loop filter topology of the CDCE62005. It facilitates both internal and external

implementations providing optimal flexibility.

Figure 29. CDCE62005 Loop Filter Topology

8.3.5.19 Internal Loop Filter Component Configuration

Figure 29 contains five different loop filter components with programmable values: C1, C2, R2, R3, and C3.

Table 28 shows that the CDCE62005 uses one of four different types of circuit implementation (shown in

Figure 30) for each of the internal loop filter components.

Table 28. CDCE62005 Loop Filter Component Implementation Type

IMPLEMENTATION TYPE

COMPONENT

CONTROL BITS USED

(see Figure 30)

Figure 30. CDCE62005 Internal Loop Filter Component Schematics

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